US 12,341,357 B2
Electronic device for transmitting wireless power and operating method therefor
Sangwook Lee, Suwon-si (KR); Sungbum Park, Suwon-si (KR); Hyunseok Shin, Suwon-si (KR); Youngho Ryu, Suwon-si (KR); Kyungmin Lee, Suwon-si (KR); Cheonyong Lim, Suwon-si (KR); and Jinsu Choi, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Mar. 22, 2023, as Appl. No. 18/124,963.
Application 18/124,963 is a continuation of application No. PCT/KR2021/012748, filed on Sep. 17, 2021.
Claims priority of application No. 10-2020-0131434 (KR), filed on Oct. 12, 2020.
Prior Publication US 2023/0231424 A1, Jul. 20, 2023
Int. Cl. H02J 50/90 (2016.01); H02J 50/10 (2016.01); H02J 50/60 (2016.01)
CPC H02J 50/90 (2016.02) [H02J 50/10 (2016.02); H02J 50/60 (2016.02)] 12 Claims
OG exemplary drawing
 
1. A wireless power transmission device comprising:
a plurality of sensing coils configured to sense an external device;
a power transmission coil configured to transmit power to the external device; and
a processor configured to:
sequentially apply powers having magnitudes set to respectively correspond to each sensing coil of the plurality of sensing coils to the power transmission coil,
identify an induction voltage induced in each sensing coil of the plurality of sensing coils during a period in which the power corresponding to each sensing coil of the plurality of sensing coils among the powers is applied,
sense the external device located on the wireless power transmission device based on the identified induction voltages;
determine that the external device is sensed based on the induction voltage induced in each sensing coil of the plurality of sensing coils during the period in which the power corresponding to each sensing coil of the plurality of sensing coils among the powers is applied being different from a preset value by at least a predetermined amount;
based on a number of the plurality of sensing coils in which the power that is applied is different from the preset value being less than a predetermined number of coils, determine a type of the external device to be a foreign material and stop the transmission of the power to the external device; and
based on the number of the plurality of sensing coils in which the power that is applied is different from the preset value being greater than the predetermined number of coils, determine the type of the external device to be a heating target and continue the transmission of the power to the external device.